1
|
Sun CH, Li M, Li QY, Liang Y, Sun YC, Zhu X. [ANCA-negative granulomatosis with polyangiitis: a case report]. Zhonghua Jie He He Hu Xi Za Zhi 2024; 47:240-244. [PMID: 38448175 DOI: 10.3760/cma.j.cn112147-20230813-00073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
We reported a case of 73-year-old male with multiple pulmonary nodules and cavities. The patient was admitted with a chief complaint of "dry cough with shortness of breath for 3 months". Chest CT showed multiple irregular masses, nodules, and patchy lesions in both lungs, accompanied by the formation of cavities. He also had anemia and renal dysfunction. Despite given empirical anti-infective and anti-tuberculosis treatments, the pulmonary nodules progressed, and the cavities enlarged. Anti-neutrophil cytoplasmic antibodies (ANCA) were negative twice. Bronchoscopic biopsy was performed. The mucosal pathology of the right middle lobe lesion showed little necrosis, focal granulomatous structure formation, and relevant vasculitis and remaining vessel wall structure in the necrosis lesions by elastic fiber staining. A clinical diagnosis of ANCA-negative necrotizing granulomatous polyangiitis was made and the patient was treated with glucocorticoids and cyclophosphamide. The nodules and cavities shrank, and some lesions were absorbed.
Collapse
Affiliation(s)
- C H Sun
- Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing 100191, China
| | - M Li
- Department of Pathology, Peking University Third Hospital, Beijing 100191, China
| | - Q Y Li
- Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Y Liang
- Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Y C Sun
- Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing 100191, China
| | - X Zhu
- Department of Pathology, Peking University Third Hospital, Beijing 100191, China
| |
Collapse
|
2
|
Nikitina EP, Buyantueva LB, Abidueva EY, Sun CH. Taxonomic and ecophysiological characteristics of actinobacteria in soils of the dry steppe zone of the Selenga Highlands (Western Transbaikalia). Vavilovskii Zhurnal Genet Selektsii 2023; 27:411-420. [PMID: 37465188 PMCID: PMC10350862 DOI: 10.18699/vjgb-23-49] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 08/01/2022] [Accepted: 08/03/2022] [Indexed: 07/20/2023] Open
Abstract
Arid habitats have recently attracted increasing attention in terms of biodiversity research and the discovery of new bacterial species. These habitats are among the target ecosystems suitable for isolating new strains of actinobacteria that are likely to produce new metabolites. This paper presents the results on the isolation of actinobacteria from soils of the dry steppe zone of the Selenga Highlands, the characterization of their taxonomic diversity, as well as ecological and trophic properties. The bacterial counts on ISP 4 medium ranged from 6.6 × 105 to 7.1 × 106 CFU/g. The highest bacterial counts were observed in the subsurface and middle horizons of the studied soils. 28 strains of Gram-positive bacteria represented by thin-branched mycelium, coccoid and bacilliform forms were isolated. According to the results of 16S rRNA gene analysis, the isolated strains were representatives of Streptomyces, Arthrobacter, Glycomyces, Kocuria, Microbacterium, Micromonospora, Nocardioides, Pseudarthrobacter, and Rhodococcus (Actinomycetota). One isolate that showed low 16S rRNA gene sequence similarity with previously isolated and validly described species was a new species of the genus Glycomyces. It was shown that all tested strains are mesophilic, prefer neutral or slightly alkaline conditions, have growth limits in the temperature range of 5-45 °C and pH 6-9. The optimal NaCl concentration for growth of most strains was 0-1 %. The strains under study were capable of utilizing a wide range of mono- and disaccharides and polyatomic alcohols as a carbon source. The isolated strains were capable of using both organic (proteins and amino acids) and inorganic (ammonium salts and nitrates) compounds as nitrogen sources. The examinations of extracellular enzymes showed that all isolates were capable of producing catalase and amylase; 78.6 % of the total number of isolates produced protease and lipase; 53.6 %, cellulase; and 28.6 %, urease. The data obtained expand current knowledge about the diversity of microbial communities in soils of the Selenga Highlands and also confirm the potential of searching for new actinobacteria species in these soils.
Collapse
Affiliation(s)
- E P Nikitina
- Baikal Institute of Nature Management of the Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Russia Banzarov Buryat State University, Ulan-Ude, Russia
| | | | - E Yu Abidueva
- Institute of General and Experimental Biology of the Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Russia
| | - C H Sun
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences, Beijing, China
| |
Collapse
|
3
|
Shen XD, Zhang RN, Huang SY, Wang YD, Liu RY, Meng JX, Zhou J, Chen Z, Fang JY, Mao R, Li ZP, Sun CH, Feng ST, Lin SC, Zhong YK, Li XH. Preoperative computed tomography enterography-based radiomics signature: A potential predictor of postoperative anastomotic recurrence in patients with Crohn's disease. Eur J Radiol 2023; 162:110766. [PMID: 36924538 DOI: 10.1016/j.ejrad.2023.110766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/14/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023]
Abstract
BACKGROUND More than half of patients with Crohn's disease (CD) require at least one surgery for symptom management; however, approximately half of the patients may experience postoperative anastomotic recurrence (PAR). OBJECTIVES This study aims to develop and validate a preoperative computed tomography enterography (CTE)-based radiomics signature to predict early PAR in CD. DESIGN A total of 186 patients with CD (training cohort, n = 134; test cohort, n = 52) who underwent preoperative CTE and surgery between January 2014 and June 2020 were included in this retrospective multi-centre study. METHODS 106 radiomic features were initially extracted from intestinal lesions and peri-intestinal mesenteric fat, respectively; significant radiomic features were selected from them and then used to develop intestinal or mesenteric radiomics signatures, using the least absolute shrinkage and selection operator and a Cox regression model. A radiomics-based nomogram incorporating these signatures with clinical-radiological factors was created for comparison with a model based on clinical-radiological features alone. RESULTS 68 of 134 patients in training cohort and 16 of 52 patients in test cohort suffered from PAR. The intestinal radiomic signature (hazard ratio [HR]: 2.17; 95% confidence interval [CI]: 1.32-3.58; P = 0.002) and mesenteric radiomic signature (HR: 2.19; 95% CI: 1.14-4.19; P = 0.018) were independent risk factors for PAR in the training cohort as per a multivariate analysis. The radiomics-based nomogram (C-index: 0.710; 95% CI: 0.672-0.748) yielded superior predictive performance than the clinical-radiological model (C-index, 0.607; 95% CI: 0.582-0.632) in the test cohort. Decision curve analysis demonstrated that the radiomics-based nomogram outperformed the clinical-radiological model in terms of clinical usefulness. CONCLUSIONS Preoperative mesenteric and intestinal CTE radiomics signatures are potential non-invasive predictors of PAR in postoperative patients with CD.
Collapse
Affiliation(s)
- Xiao-di Shen
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Ruo-Nan Zhang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Si-Yun Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Yang-di Wang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Ren-Yi Liu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Ji-Xin Meng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Jie Zhou
- Department of Radiology, The Sixth Affiliated Hospital, Sun Yat-Sen University, Yuancun Er Heng Road, NO.26, Guangzhou 510655, People's Republic of China
| | - Zhao Chen
- Department of medical imaging center, Nan Fang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, People's Republic of China
| | - Jia-Yu Fang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Zi-Ping Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China
| | - Shao-Chun Lin
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China.
| | - Ying-Kui Zhong
- Department of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-Sen University, Yuancun Er Heng Road, NO.26, Guangzhou 510655, People's Republic of China.
| | - Xue-Hua Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China.
| |
Collapse
|
4
|
Sun CH, Gao ZL, Lin K, Yang H, Zhao CY, Lu R, Wu LY, Chen Y. [Efficacy analysis of selective genicular artery embolization in the treatment of knee pain secondary to osteoarthritis]. Zhonghua Yi Xue Za Zhi 2022; 102:795-800. [PMID: 35325959 DOI: 10.3760/cma.j.cn112137-20210926-02166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the efficacy and safety of selective genicular artery embolization for the treatment of the knee pain secondary to osteoarthritis. Methods: From October 2020 to July 2021, 17 patients (23 knees) aged (68±7) years with moderate to severe knee pain secondary to knee osteoarthritis were prospectively included in the General Hospital of Ningxia Medical University. There were 6 males and 11 females included in this research. Patients were assessed with knee pain, stiffness, and function with the Visual Analogue Scale (VAS) and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) at baseline, using the Kellgren-Lawrence (K-L) grading to evaluate the severity of KOA, and using the Magnetic Resonance Knee Osteoarthritis Score (MOAKS) to evaluate the MR imaging characteristics of the affected knee. Selective genicular artery embolization (GAE) was performed in all patients. The patients were followed up for 6 months after the procedure. Patients were assessed with the VAS score and WOMAC scale at 1 d, 1 week and 1, 3 and 6 months after the procedure to evaluate the clinical outcomes, including the improvement of knee joint pain, stiffness and function, as well as the occurrence of adverse reactions. Results: Three to seven genicular artery branches were superselected and embolized in 23 knees, and 4 to 7 genicular artery branches were embolized in 7 patients with K-L grade 4. The clinical improvement was 95.6% (22/23) at 1 month, 86.9% (20/23) at 3 months, and 91.3% (21/23) at 6 months. Twenty-three knees completed the 6-month follow-up, and the VAS score, WOMAC pain score, and total WOMAC score at 1, 3, and 6 months after surgery were (2.5±1.3), (3.4±2.4), and (19.7±9.8) points, (3.0±1.8), (4.5±3.4), and (22.3±11.3) points, (2.8±1.5), (4.1±3.0), and (20.5±11.0) points, which were lower than the (6.6±0.9), (11.4±2.6) and (47.0±12.0) points at baseline (all P<0.001). During the follow-up period, 7 patients had adverse reactions: 3 cases had skin ecchymosis in the femoral artery puncture area, 4 cases had knee joint stiffness and pain within 1 day after operation, which were relieved spontaneously in 1 week, 6 patients had joint clicking during extension and flexion activities after operation, of which 3 cases subsided spontaneously within 3 months after operation. None of the patients had major procedure-related adverse events. Conclusion: GAE has a high clinical improvement rate and a low incidence of adverse reactions in the treatment of the pain secondary to knee osteoarthritis, which provides a new treatment option for patients who fail to respond to conservative treatment.
Collapse
Affiliation(s)
- C H Sun
- Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China
| | - Z L Gao
- Department of Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - K Lin
- Clinical Medical College of Ningxia Medical University, Yinchuan 750004, China
| | - H Yang
- Department of Interventional Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - C Y Zhao
- Department of Interventional Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - R Lu
- Department of Interventional Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - L Y Wu
- Department of Interventional Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Y Chen
- Department of Interventional Radiology, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| |
Collapse
|
5
|
Sun CH. Scary Disseminated Peritoneal Parasite Tumors: A Rare Complication after Previous Laparoscopic Myomectomy. J Minim Invasive Gynecol 2021. [DOI: 10.1016/j.jmig.2021.09.486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
6
|
Shi L, Lu BL, Qiu Y, Huang L, Huang SY, Mao R, Lin JJ, Du JF, Feng ST, Li ZP, Sun CH, Li XH. Hepatic mosaic enhancement pattern correlates with increased inflammatory activity and adverse therapeutic outcomes in patients with Crohn's disease. Abdom Radiol (NY) 2021; 46:3149-3158. [PMID: 33646351 DOI: 10.1007/s00261-021-02979-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/25/2021] [Accepted: 02/09/2021] [Indexed: 11/24/2022]
Abstract
PURPOSE This study aimed to evaluate the role of hepatic mosaic enhancement pattern (HMEP) on computed tomography images in the disease activity and therapeutic outcome of Crohn's Disease (CD). METHODS Twenty-five CD patients with HMEP comprised the HMEP group, and 25 CD patients without HMEP, who had a similar onset age, sex, and disease course with those in the HMEP group, comprised the non-HMEP group. No underlying liver/biliary disease was observed in any of the patients. Clinical characteristics, laboratory test results, Lémann index, and CD endoscopic index of severity (CDEIS) were compared between the groups using the Student t-, Mann-Whitney U, Chi square, or Fisher's exact tests. Patients received top-down, step-up, or traditional treatment during the follow-up period. After the 1-year follow-up, therapeutic outcomes (active inflammation [CDEIS > 3.5 if the endoscopic data were available, or C-reactive protein level > 5 mg/L if the endoscopic data were unavailable] or remission) were evaluated. RESULTS The occurrence rate of fistulas/abscesses was higher in the HMEP group (84%, 21/25) than in the non-HMEP group (48%, 12/25) with no statistical significance (P = 0.056). The HMEP group showed a higher C-reactive protein level (P = 0.001), erythrocyte sedimentation rate (P = 0.013), and blood platelet count (P = 0.005). There was no significant difference in therapeutic strategies between the groups (P = 0.509). The HMEP group showed a significantly lower remission ratio after anti-inflammatory treatment than the non-HMEP group (P = 0.045). CONCLUSIONS HMEP was correlated with increased inflammatory activity and adverse therapeutic outcomes in CD. This finding provided insights regarding novel markers of CD diagnosis and treatment.
Collapse
Affiliation(s)
- Li Shi
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
- Department of Radiology, The Third Affiliated Hospital of Guangzhou Medical University, 63 Duobao Road, Guangzhou, 510150, People's Republic of China
| | - Bao-Lan Lu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Yun Qiu
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Li Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Si-Yun Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Jin-Jiang Lin
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Jin-Fang Du
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Zi-Ping Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China.
| | - Xue-Hua Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China.
| |
Collapse
|
7
|
Li XH, Feng ST, Cao QH, Coffey JC, Baker ME, Huang L, Fang ZN, Qiu Y, Lu BL, Chen ZH, Li Y, Bettenworth D, Iacucci M, Sun CH, Ghosh S, Rieder F, Chen MH, Li ZP, Mao R. Degree of Creeping Fat Assessed by Computed Tomography Enterography is Associated with Intestinal Fibrotic Stricture in Patients with Crohn's Disease: A Potentially Novel Mesenteric Creeping Fat Index. J Crohns Colitis 2021; 15:1161-1173. [PMID: 33411893 PMCID: PMC8427713 DOI: 10.1093/ecco-jcc/jjab005] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS Emerging evidence points to a link between creeping fat and the pathogenesis of Crohn's disease [CD]. Non-invasive assessment of the severity of creeping fat on cross-sectional imaging modality has seldom been investigated. This study aimed to develop and characterize a novel mesenteric creeping fat index [MCFI] based on computed tomography [CT] in CD patients. METHODS MCFI was developed based on vascular findings on CT in a retrospective cohort [n = 91] and validated in a prospective cohort [n = 30]. The severity of creeping fat was graded based on the extent to which mesenteric fat extended around the intestinal circumference using the vessels in the fat as a marker. The accuracy of MCFI was assessed by comparing it with the degree of creeping fat observed in surgical specimens. The relationship between MCFI and fibrostenosis was characterized by determining if these correlated. The accuracy of MCFI was compared with other radiographic indices [i.e. visceral to subcutaneous fat area ratio and fibrofatty proliferation score]. RESULTS In the retrospective cohort, MCFI had moderate accuracy in differentiating moderate-severe from mild fibrostenosis (area under the receiver operating characteristic [ROC] curve [AUC] = 0.799; p = 0.000). ROC analysis in the retrospective cohort identified a threshold MCFI of > 3 which accurately differentiated fibrostenosis severity in the prospective cohort [AUC = 0.756; p = 0.018]. An excellent correlation was shown between MCFI and the extent of fat wrapping in specimens in the prospective cohort [r = 0.840, p = 0.000]. Neither visceral to subcutaneous fat area ratio nor fibrofatty proliferation score correlated well with the degree of intestinal fibrosis. CONCLUSIONS MCFI can accurately characterize the extent of mesenteric fat wrapping in surgical specimens. It may become another non-invasive measure of CD fibrostenosis.
Collapse
Affiliation(s)
- Xue-Hua Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Qing-Hua Cao
- Department of Pathology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - J Calvin Coffey
- Department of Surgery, University Hospital Group Limerick and School of Medicine, University of Limerick, Limerick, Ireland
| | - Mark E Baker
- Section of Abdominal Imaging, Imaging Institute, Digestive Disease Institute and Cancer Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Li Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Zhuang-Nian Fang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Yun Qiu
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Bao-Lan Lu
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Zhi-Hui Chen
- Department of Gastrointestinal and Pancreatic Surgery, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Yi Li
- Center for Inflammatory Bowel Diseases, Department of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, People’s Republic of China
| | - Dominik Bettenworth
- Department of Medicine B for Gastroenterology and Hepatology, University Hospital Münster, Münster, Germany
| | - Marietta Iacucci
- NIHR Biomedical Research Institute, Institute of Translational Medicine, University of Birmingham and University Hospitals Birmingham NHS Foundation Trust, UK
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Subrata Ghosh
- NIHR Biomedical Research Institute, Institute of Translational Medicine, University of Birmingham and University Hospitals Birmingham NHS Foundation Trust, UK
| | - Florian Rieder
- Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Min-Hu Chen
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Zi-Ping Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People’s Republic of China,Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio, USA,Corresponding author: Ren Mao, The First Affiliated Hospital, Sun Yat-Sen University, 58 Zhongshan Road 2nd, Guangzhou 510080, People’s Republic of China; Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio, USA. Tel: 86-20-87755766-8471; Fax: 86-20-87615805;
| |
Collapse
|
8
|
Li Y, Li L, Niu YC, Sun CH. [Several considerations on the establishment of a new public health and preventive medicine system in national level]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:469-474. [PMID: 32388945 DOI: 10.3760/cma.j.cn112150-20200221-00159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Based on the new mission of public health set in the Healthy China strategy and the insufficient response to COVID-19, this article pointed out the problems of the current public health and preventive medicine system from the macro-system level, meso-organization level, and micro-individual level, including insufficient strategic planning, resource input, institutional coordination, talent training and team building. It was creatively proposed that a disease prevention and control bureau should be set up outside the health commission to implement the vertical management at four levels, from national level to province-level, including autonomous region, municipality directly under the central government, city-level and district/county-level. The disease prevention and control bureau should consist of a strategic research institute, a center for disease prevention and control (CDC), a human resources training base, and a scientific research institute, which could perform their own duties and rely on each other. Enhancing the functions of strategic planning, overall coordination, and evidence-based decision-making in the original system, emphasizing the foresight and continuity of scientific research, and allowing the CDC to focus more on health management and emergency response could better facilitate in protecting the public health, improving the health and quality of life of the entire population, and guaranteeing the social stability and development.
Collapse
Affiliation(s)
- Y Li
- Public Health College of Harbin Medical University, Harbin 150081, China
| | - L Li
- Health Management College of Harbin Medical University, Harbin 150081, China
| | - Y C Niu
- Public Health College of Harbin Medical University, Harbin 150081, China
| | - C H Sun
- Public Health College of Harbin Medical University, Harbin 150081, China
| |
Collapse
|
9
|
Meng J, Huang S, Sun C, Zhang ZW, Mao R, Yang YH, Feng ST, Li ZP, Li X. Comparison of Three Magnetization Transfer Ratio Parameters for Assessment of Intestinal Fibrosis in Patients with Crohn's Disease. Korean J Radiol 2020; 21:290-297. [PMID: 32090521 PMCID: PMC7039729 DOI: 10.3348/kjr.2019.0217] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 11/07/2019] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVE To establish a novel standardized magnetization transfer ratio (MTR) parameter which considers the element of the normal bowel wall and to compare the efficacy of the MTR, normalized MTR, and standardized MTR in evaluating intestinal fibrosis in Crohn's disease (CD). MATERIALS AND METHODS Abdominal magnetization transfer imaging from 20 consecutive CD patients were analyzed before performing elective operations. MTR parameters were calculated by delineating regions of interest in specified segments on MTR maps. Specimens with pathologically confirmed bowel fibrosis were classified into one of four severity grades. The correlation between MTR parameters and fibrosis score was tested by Spearman's rank correlation. Differences in MTR, normalized MTR, and standardized MTR across diverse histologic fibrosis scores were analyzed using the independent sample t test or the Mann-Whitney U test. The area under the receiver operating characteristic curve (AUC) was computed to test the efficacies of the MTR parameters in differentiating severe intestinal fibrosis from mild-to-moderate fibrosis. RESULTS Normalized (r = 0.700; p < 0.001) and standardized MTR (r = 0.695; p < 0.001) showed a strong correlation with bowel fibrosis scores, followed by MTR (r = 0.590; p < 0.001). Significant differences in MTR (t = -4.470; p < 0.001), normalized MTR (Z = -5.003; p < 0.001), and standardized MTR (Z = -5.133; p < 0.001) were found between mild-to-moderate and severe bowel fibrosis. Standardized MTR (AUC = 0.895; p < 0.001) had the highest accuracy in differentiating severe bowel fibrosis from mild-to-moderate bowel wall fibrosis, followed by normalized MTR (AUC = 0.885; p < 0.001) and MTR (AUC = 0.798; p < 0.001). CONCLUSION Standardized MTR is slightly superior to MTR and normalized MTR and therefore may be an optimal parameter for evaluating the severity of intestinal fibrosis in CD.
Collapse
Affiliation(s)
- Jixin Meng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Siyun Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - CanHui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zhong Wei Zhang
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yan Hong Yang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Shi Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zi Ping Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - XueHua Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China.
| |
Collapse
|
10
|
Fang ZN, Li XH, Lin JJ, Huang SY, Cao QH, Chen ZH, Sun CH, Zhang ZW, Rieder F, Rimola J, Chen MH, Li ZP, Mao R, Feng ST. Magnetisation transfer imaging adds information to conventional MRIs to differentiate inflammatory from fibrotic components of small intestinal strictures in Crohn's disease. Eur Radiol 2020; 30:1938-1947. [PMID: 31900705 PMCID: PMC7760892 DOI: 10.1007/s00330-019-06594-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 11/09/2019] [Accepted: 11/14/2019] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Identifying inflammation- or fibrosis-predominant strictures in Crohn's disease (CD) is crucial for treatment strategies. We evaluated the additive value of magnetisation transfer (MT) to conventional MRI for differentiating CD strictures using surgical histopathology as a reference standard. METHODS Twenty-eight consecutive CD patients who underwent MRI preoperatively were recruited. MRI parameters included T2-weighted imaging (T2WI) hyperintensity, bowel wall thickness, enhancement pattern changes over time, enhancement pattern and gain ratio in dynamic contrast-enhanced phases, and MT ratio. Correlation analysis was performed using Spearman's rank test. Receiver operating characteristic curve analysis and Cohen's κ were used. A model with combined MRI variables characterising intestinal strictures was proposed and validated in 14 additional CD patients. RESULTS Significant correlations with histological inflammation scores were shown for wall thickness (r = 0.361, p = 0.001) and T2WI hyperintensity (r = 0.396, p < 0.001), whereas histological fibrosis scores were significantly correlated with MT ratio (r = 0.681, p < 0.001) and wall thickness (r = 0.461, p < 0.001). T2WI hyperintensity could differentiate mild from moderate-to-severe inflammation with a sensitivity of 0.871 and a specificity of 0.800. MT ratio could discriminate mild from moderate-to-severe fibrosis with a sensitivity and a specificity of 0.913 and 0.923, respectively. Combining MT ratio and T2WI hyperintensity, the MRI classification moderately agreed with the pathological stricture classification (p < 0.01, κ = 0.549). In the validation set, the diagnostic accuracy of T2WI hyperintensity and MT ratio were 86% and 89%, with good agreement between MRI and histopathological classification (p < 0.01, κ = 0.665). CONCLUSIONS MT ratio combined with conventional MRI improves the differentiation of fibrotic from inflammatory components of small-bowel strictures in CD patients. KEY POINTS • MT ratio from magnetisation transfer imaging combined with T2WI from conventional MRI can simultaneously characterise bowel fibrosis and inflammation in adult Crohn's disease.
Collapse
Affiliation(s)
- Zhuang-Nian Fang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Xue-Hua Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Jin-Jiang Lin
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Si-Yun Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Qing-Hua Cao
- Department of Pathology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Zhi-Hui Chen
- Department of Gastrointestinal and Pancreatic Surgery, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Zhong-Wei Zhang
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, 510 South Kingshighway Boulevard, St. Louis, MO, 6310, USA
| | - Florian Rieder
- Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, USA
| | - Jordi Rimola
- Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Villarroel 170, 08036, Barcelona, Barcelona, Spain
| | - Min-Hu Chen
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Zi-Ping Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China.
| | - Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan II Road, Guangzhou, 510080, People's Republic of China.
| |
Collapse
|
11
|
Sun CH. 2 Methods for Identification and Preservation of Hypogastric Nerve During Laparoscopic Die (Deep Infiltrating Endometriosis) Surgery. J Minim Invasive Gynecol 2019. [DOI: 10.1016/j.jmig.2019.09.723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
12
|
Chen J, Li W, Wen LT, Yang C, Sun CH, Qiu JH, Zha DJ. [Crouzon syndrome with secretory otitis media: a case report and literature review]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:845-847. [PMID: 31446701 DOI: 10.13201/j.issn.1001-1781.2019.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Indexed: 11/12/2022]
Abstract
Summary Clinical data from a case of Crouzon syndrome with secretory otitis media in our department was collected and the related literatures were reviewed. Whole exome sequecing and Sanger sequencing were performed to analyze genetic cause. The 6-year old patient with Crouzon syndrome had snoring and mouth breathing during sleep for 2 years, and was found hearing loss for 2 weeks. The results of endoscopy showed adenoid hypertrophy and secretory otitis media of both ears. And CT scan proved chronic rhinosinusitis. Myringotomy and adenoidectomy were done under general anesthesia. The follow-up at 6 months showed normal sleep and hearing level. A heterozygous fibroblast growth factor receptor 2 missense mutation(c.1061C>G, p.S354C) in exon 8 was identified in this patient.
Collapse
|
13
|
Affiliation(s)
- Xiao-Song Jiang
- Department of Radiology, Guangdong Women and Children Hospital, Guangzhou 511400, China
| | - Huan-Jun Wang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Jin-Hua Lin
- Ultrosounic Department, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Yan Guo
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Ling Lin
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Jian Guan
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| |
Collapse
|
14
|
Fu SL, Sun CH, Shang XX, Liu XS. High quality nursing of children with pneumonia complicated with heart failure. J BIOL REG HOMEOS AG 2019; 33:905-910. [PMID: 31165607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Children with severe pneumonia often have heart failure. This study explored the clinical effect of high quality nursing intervention on children with pneumonia complicated with heart failure. In the study, 96 children with pneumonia complicated with heart failure were selected and randomly divided into a conventional nursing group (n=48) and a high quality nursing group (n=48). Based on the conventional nursing, the children in one group were given high quality nursing, and comprehensive nursing was carried out in aspects such as respiratory tract, medication, psychology and diet. Then, the heart rate, respiratory rate, heart failure correction time, hospitalization time, cost and nursing satisfaction were compared between the two groups. The results showed that the heart rate of the high quality nursing group was 145.37±8.72 times/min and the respiratory rate was 45.65±6.08 times/min, which were significantly lower than those of the conventional nursing group (P less than 0.05). The correction time of heart failure was about 32 h in the high quality nursing group, and the length and cost of hospitalization were significantly lower than those in the conventional nursing group (P less than 0.05). The nursing satisfaction of the patients' family members in the high quality nursing group was also higher (P less than 0.05). This study shows that high quality nursing can promote the recovery of children with pneumonia complicated with heart failure, and is worth popularizing widely in clinics.
Collapse
Affiliation(s)
- S L Fu
- The Second Ward of Paediatric Department, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - C H Sun
- The Second Ward of Paediatric Department, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - X X Shang
- The Second Ward of Paediatric Department, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| | - X S Liu
- Nursing Department, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China
| |
Collapse
|
15
|
Huang SY, Li XH, Huang L, Sun CH, Fang ZN, Zhang MC, Lin JJ, Jiang MJ, Mao R, Li ZP, Zhang Z, Feng ST. T2* Mapping to characterize intestinal fibrosis in crohn's disease. J Magn Reson Imaging 2018; 48:829-836. [PMID: 29663577 DOI: 10.1002/jmri.26022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/02/2018] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Assessing bowel fibrosis in patients with Crohn's disease (CD) has important therapeutic implications. PURPOSE To determine the utility of T2* mapping versus that of contrast enhanced (CE) imaging in grading intestinal fibrosis in patients with CD using surgical pathology as the reference standard. STUDY TYPE Prospective. SPECIMENS 102 specimens from 27 patients with CD. FIELD STRENGTH/SEQUENCE 3.0T; T2WI; T1WI; T2*WI. ASSESSMENT The T2*WI values of the bowel wall targeted for resection were measured by two radiologists by drawing regions of interest on the thickened bowel wall. The resected bowel specimens with pathological fibrosis and type I collagen were classified into four severity grades (0-3) by a pathologist using a semi-quantitative scoring system. STATISTICAL TESTS The differences in the T2*WI values among the different histological grades were analyzed using one-way analysis of variance or the Kruskal-Wallis test, and their correlations were analyzed. The ability of the T2*WI values to discriminate between various degrees of fibrosis was assessed using a receiver operating characteristic (ROC) curve. RESULTS Significant differences were observed in the T2* values of mild (23.56 ± 1.60 ms), moderate (16.19 ± 0.55 ms), and severe (13.59 ± 0.53 ms) fibrosis types (F = 35.84; P < 0.001). T2* values were moderately associated with histological fibrosis (r = -0.627; P < 0.001) and type I collagen scores (r = -0.588; P < 0.001). T2* values were highly accurate, with an area under the ROC curve (AUC) of 0.951 (P < 0.001) for differentiating moderate-to-severe fibrosis from nonfibrosis and mild fibrosis, followed by an AUC of 0.508 for the percentage of enhancement gain (P = 0.908). A threshold T2* value of 18.06 ms was recommended for diagnosing moderate-to-severe fibrosis with 94.7% sensitivity and 78.3% specificity. DATA CONCLUSION MRI T2* mapping outperforms CE parameters in distinction of various degrees of bowel fibrosis in CD. LEVEL OF EVIDENCE 1 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2018.
Collapse
Affiliation(s)
- Si-Yun Huang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Xue-Hua Li
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Li Huang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Zhuang-Nian Fang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Meng-Chen Zhang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Jin-Jiang Lin
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Meng-Jie Jiang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
- Department of Radiology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, P.R. China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Zi-Ping Li
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| | - Zhongwei Zhang
- Department of Radiology, University of Florida, Gainesville, Florida, USA
| | - Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, P.R. China
| |
Collapse
|
16
|
Sun CH, Wei DM, Wen YH, An CM, Zhang XW, Liu ZY, Lu H, Chen XW, Wang BX, Lin Y, Chen L, Zhao Y, Wang P, Liu M, Pan XL. [Conference Summary of the Second Annual Meeting of the Society for Head and Neck Surgery and the Symposium on Head and Neck Tumor Resection and Functional Reconstruction]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 53:317-320. [PMID: 29747262 DOI: 10.3760/cma.j.issn.1673-0860.2018.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- C H Sun
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin 150086, China
| | - D M Wei
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, Key Laboratory of Otorhinolaryngology, National Health and Family Planning Commission (Shandong University), Jinan 250012, China
| | - Y H Wen
- Department of Otorhinolaryngology, the First Affliated Hospital of Sun Yat-sen University, Guangzhou Key Caboratory of Otorhinolaryngology, Guangzhou 510080, China
| | - C M An
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100020, China
| | - X W Zhang
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100020, China
| | - Z Y Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Key Laboratory of Otorhinolaryngology Head and Neck Surgery, Ministry of Education, Beijing 100730, China
| | - H Lu
- Department of Head and Neck Surgery, Harbin Medical University Cancer Hospital, Harbin 150040, China
| | - X W Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai General Hospital, Shanghai 200080, China
| | - B X Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Shanghai General Hospital, Shanghai 200080, China
| | - Y Lin
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, Key Laboratory of Otorhinolaryngology, National Health and Family Planning Commission (Shandong University), Jinan 250012, China
| | - L Chen
- Department of Otorhinolaryngology, the First Affliated Hospital of Sun Yat-sen University, Guangzhou Key Caboratory of Otorhinolaryngology, Guangzhou 510080, China
| | - Y Zhao
- Department of Otorhinolaryngology, the First Affliated Hospital of Sun Yat-sen University, Guangzhou Key Caboratory of Otorhinolaryngology, Guangzhou 510080, China
| | - P Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin 150086, China
| | - M Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Second Affiliated Hospital, Harbin Medical University, Harbin 150086, China
| | - X L Pan
- Department of Otorhinolaryngology, Qilu Hospital of Shandong University, Key Laboratory of Otorhinolaryngology, National Health and Family Planning Commission (Shandong University), Jinan 250012, China
| |
Collapse
|
17
|
Han PP, Zou MY, Yang XL, Liu XC, Liang S, Sun CH, Xia W, Wu LJ. [Sleep problems and the association with the levels of 6-sulfatoxymelatonin in children with autism spectrum disorder]. Zhonghua Er Ke Za Zhi 2018; 55:911-915. [PMID: 29262470 DOI: 10.3760/cma.j.issn.0578-1310.2017.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To identify the prevalence of sleep problems in children with autism spectrum disorder (ASD) and to explore the association with the main melatonin metabolite, 6-sulfatoxymelatonin (6-SM). Method: This was a prospective case-control study. Children with ASD were recruited from Child Development and Behavioral Research Center (CDBRC) of the Harbin Medical University and Harbin Special Education School from October 2015 to April 2017 (ASD group) . Healthy controls were selected from five kindergartens and one primary school in Harbin by the stratified cluster random sampling (control group) . The Children's Sleep Habits Questionnaire (CSHQ) was used to investigate the sleep problems of the two groups. The patients were matched in a 1∶1 ratio for the age and sex, and the urine samples of case-control pairs were collected in the morning. The level of 6-SM was measured by the enzyme linked immunosorbent assay (ELISA). The student's t test was used for comparison between the ASD group and control group, and the Pearson correlation analysis was used to determine the correlation difference. Result: A total of 212 ASD children (mean (±SD) age was (6.0±2.7) years, and 181 patients (85.4%) were male), and a total of 334 healthy children(mean (±SD) age was (5.9±2.6) years, and 272 patients (81.4%) were male) were recruited. Among them, 101 matched case-control pairs completed the collection of urine samples. According to the statistical analysis, the scores of total CSHQ, bedtime resistance, sleep onset delay, sleep duration, night waking, parasomnia, sleep disordered breathing and daytime sleepiness in children with ASD were significantly higher than those in the control group (48.2±6.2 vs. 46.6±5.4, 11.4±2.5 vs. 10.7±2.8, 1.7±0.8 vs. 1.5±0.7, 4.1±1.4 vs. 3.7±1.1, 4.2±1.5 vs. 3.8±1.1, 8.5±1.5 vs. 8.3±1.4, 3.7±1.0 vs. 3.4±0.8, 11.7±2.5 vs. 12.4±2.7, t=3.16, 3.00, 3.23, 2.76, 3.19, 1.99, 3.45,-2.72, P=0.002, 0.003, 0.001, 0.006, 0.002, 0.048, 0.001, 0.007), the level of 6-SM was significantly lower in children with ASD than that of healthy controls ((1.24±0.50) vs. (1.68±0.63)μg/h, t=-5.50, P<0.01), and the total CSHQ score was negatively correlated with the level of 6-SM (r=-0.50, P<0.01). Conclusion: The children with ASD were at high risk for sleep problems, and the melatonin metabolite of ASD group was abnormal compared with that of the control group. Moreover, there was a negative correlation between the severity of sleep problems and the level of 6-SM in ASD children. The results of our study indicate that the abnormal melatonin metabolism may be one of the causes of sleep problems in children with ASD.
Collapse
Affiliation(s)
- P P Han
- Department of Child and Adolescent Health, Public Health College, Harbin Medical University, Harbin 150081, China
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Wang MQ, Li Y, Sun CH. [The relationship between gut microbiota and diet and nutrition related diseases]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:195-200. [PMID: 29429278 DOI: 10.3760/cma.j.issn.0253-9624.2018.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The human gastro-intestinal tract is not only the habitat of gut microbiota, but also the main place that the body gets available nutrients. Therefore, the gut microbiota of human can be inseparable associated with the human nutrition. The common technologies used among gut microbiota research included metageonomic, metatranscriptomics, metaproteomics, and metabolomics. The research of gut microbiota based on above omics methods confirmed that diets were the main factors influencing the composition and expression of gut microbiota. The proportion, quantity, stable state, and metabolic changes of gut microbiota were closely related to obesity, diabetes mellitus, cardiovascular disease, and other nutritional-related diseases. Reasonable dietary intervention can adjust the disorders of gut microbiota, which can achieve prevention and treatment of obesity, diabetes, cardiovascular diseases, and other nutritional-related diseases. Although the single omics methods can be used to study the problems of some aspects of gut microbiota, the combination of multi-omics is needed to achieve the above objectives.
Collapse
Affiliation(s)
- M Q Wang
- School of Public Health, Harbin Medical University, Harbin 150081, China
| | | | | |
Collapse
|
19
|
Sun CH. [Prospective thoughts of nutrition landscape]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:121-123. [PMID: 29429263 DOI: 10.3760/cma.j.issn.0253-9624.2018.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- C H Sun
- Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin 150081, China
| |
Collapse
|
20
|
Li XH, Mao R, Huang SY, Sun CH, Cao QH, Fang ZN, Zhang ZW, Huang L, Lin JJ, Chen YJ, Rimola J, Rieder F, Chen MH, Feng ST, Li ZP. Characterization of Degree of Intestinal Fibrosis in Patients with Crohn Disease by Using Magnetization Transfer MR Imaging. Radiology 2018; 287:494-503. [PMID: 29357272 DOI: 10.1148/radiol.2017171221] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Purpose To evaluate the role of magnetization transfer (MT) magnetic resonance (MR) imaging for the characterization of intestinal fibrosis compared with contrast material-enhanced and diffusion-weighted MR imaging and its capability for differentiating fibrotic from inflammatory strictures in humans with Crohn disease (CD) by using surgical histopathologic analysis as the reference standard. Materials and Methods Institutional review board approval and informed consent were obtained for this prospective study. Abdominal MT imaging, contrast-enhanced imaging, and diffusion-weighted imaging of 31 consecutive patients with CD were analyzed before elective surgery. The bowel wall MT ratio normalized to skeletal muscle, the apparent diffusion coefficient (ADC), and the percentage of enhancement gain were calculated; region-by-region correlations with the surgical specimen were performed to determine the histologic degree of fibrosis and inflammation. The performance of MT imaging was validated in five new patients. One-way analysis of variance test, Spearman rank correlation, and receiver operating characteristic curve were used for statistical analysis. Results Normalized MT ratios strongly correlated with fibrosis scores (r = 0.769; P = .000) but did not correlate with inflammation scores (r = -0.034; P = .740). Significant differences (F = 49.002; P = .000) in normalized MT ratios were found among nonfibrotic, mildly, moderately, and severely fibrotic walls. The normalized MT ratios of mixed fibrotic and inflammatory bowel walls were significantly higher than those of bowel walls with only inflammation present (t = -8.52; P = .000). A high accuracy of normalized MT ratios was shown with an area under the receiver operating characteristic curve (AUC) of 0.919 (P = .000) for differentiating moderately to severely fibrotic bowel walls from nonfibrotic and mildly fibrotic bowel walls, followed by ADC (AUC, 0.747; P = .001) and the percentage of enhancement gain (AUC, 0.592; P = .209). The sensitivity, specificity, and AUC of MT imaging for diagnosing moderate to severe fibrosis in the validation data set were 80% (12 of 15), 100% (three of three), and 0.9 (P = .033), respectively. Conclusion MT imaging outperforms ADC and contrast-enhanced imaging in detecting and distinguishing varying degrees of bowel fibrosis with or without coexisting inflammation. MT imaging could potentially be used as a method to differentiate fibrotic from inflammatory intestinal strictures in patients with CD. © RSNA, 2018 Online supplemental material is available for this article.
Collapse
Affiliation(s)
- Xue-Hua Li
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Ren Mao
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Si-Yun Huang
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Can-Hui Sun
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Qing-Hua Cao
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Zhuang-Nian Fang
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Zhong-Wei Zhang
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Li Huang
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Jin-Jiang Lin
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Yu-Jun Chen
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Jordi Rimola
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Florian Rieder
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Min-Hu Chen
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Shi-Ting Feng
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| | - Zi-Ping Li
- From the Departments of Radiology (X.H.L., S.Y.H., C.H.S., Z.N.F., L.H., J.J.L., S.T.F., Z.P.L.), Gastroenterology (R.M., M.H.C.), Pathology (Q.H.C.), and Ultrasound (Y.J.C.), The First Affiliated Hospital of Sun Yat-Sen University, 58 Zhongshan II Road, Guangzhou 510080, People's Republic of China; Department of Biomedical Engineering, Cancer Biology and Radiology, Wake Forest School of Medicine, Winston-Salem, NC (Z.W.Z.); Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain (J.R.); and Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, Ohio (F.R.)
| |
Collapse
|
21
|
Affiliation(s)
- Xiao-Song Jiang
- Department of Radiology, Guangdong Women and Children Hospital, Guangzhou 511400, China
| | - Huan-Jun Wang
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Jin-Hua Lin
- Ultrosounic Department, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Yan Guo
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Ling Lin
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Jian Guan
- Department of Radiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| |
Collapse
|
22
|
Abstract
To assess the diagnostic efficacy of diffusion-weighted MR imaging (DWI) for evaluating inflammatory activity in patients with Crohn's disease (CD). A total of 47 CD patients underwent MR enterography (MRE) and DWI using 3 b values of 50, 400, and 800 s/mm. Apparent diffusion coefficients (ADCs) of inflamed and normal bowel wall were calculated. The conventional MRE findings and DWI signal intensities were qualitatively scored from 0 to 3. The correlation between Crohn disease activity index (CDAI) and both ADCs and magnetic resonance imaging scores was analyzed. Receiver-operating characteristic curve analysis was used to determine the diagnostic accuracy of CD activity. Of the 47 patients, 25 were active CD (CDAI≥150) and 22 were inactive (CDAI<150). Diffusion-weighted MR imaging and MRE + DWI scores of active CD were significantly higher than that of inactive CD (both P < 0.001). Apparent diffusion coefficients in inflamed segments of active CD were lower than that of inactive CD (P < 0.001). The DWI scores (r = 0.74, P < 0.001), ADCs (r = -0.71, P < 0.001), MRE scores (r = 0.54, P < 0.001), and MRE + DWI scores (r = 0.66, P < 0.001) were all correlated with CDAI. The areas under the receiver-operating characteristics curves for ADCs, DWI scores, MRE scores, and MRE + DWI scores ranged from 0.83 to 0.98. The threshold ADC value of 1.17 × 10 mm/s allowed differentiation of active from inactive CD with 100% sensitivity and 88% specificity. Diffusion-weighted MR imaging and ADC correlated with CD activity, and had excellent diagnostic accuracy for differentiating active from inactive CD.
Collapse
Affiliation(s)
- Xue-Hua Li
- From the Department of Radiology, (X-HL, C-HS, X-SJ, Z-PL); Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China (RM, M-HC); Department of Radiology, UT Southwestern Medical Center, Dallas, TX (Z-WZ); and Department of Radiology, Conde de S. Januario Central Hospital, Macau, China (MHP)
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Noorian AR, Rangaraju S, Sun CH, Owada K, Gupta R, Nahab F, Belagaje SR, Anderson AM, Frankel MR, Nogueira RG. Abstract W MP3: Endovascular Therapy in Large Vessel Occlusion Strokes with ASPECTS of 5-7 May Result in Reduced Infarct Volumes and Better Functional Outcomes. Stroke 2015. [DOI: 10.1161/str.46.suppl_1.wmp3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction:
Intra-arterial therapy (IAT) for large vessel occlusions strokes (LVOS) has been increasingly utilized. The benefit of endovascular reperfusion in patients with mid-range ASPECTS remains to be established.
Materials and methods:
Retrospective analysis of LVOS patients with ASPECTS 5-7 treated with IAT (n=86) or medical therapy alone (±IV t-PA; n=15) at two academic centers from 2009-2012. Definitions employed: Symptomatic ICH: any parenchymal hematoma; Successful reperfusion: modified TICI≥2B; Good and acceptable clinical outcomes: 90-day mRS 0-2 and 0-3, respectively. Final infarct volumes were calculated based on 24-hour post-procedure CT or MRI scans.
Results:
Mean age (67±14 vs. 67±19 years) and baseline NIHSS (20±5 vs. 20±6) were similar in the IAT and medical treatment groups. Successful reperfusion was achieved in 58 (67%) IAT patients. Symptomatic and asymptomatic ICH occurred in 9 (10%) and 31 (36%) IAT patients, respectively. The IAT rates of 90-day good and acceptable outcomes were 20% (17/86) and 33% (28/86), respectively. Successful reperfusion in IAT patients was associated with smaller FIV (p=0.015) and higher rates of good (p=0.02) and acceptable (p=0.03) outcomes. The median final infarct volume was significant lower with IAT vs. medical therapy (80ml [IQR, 38-122] vs. 190ml [121-267], p=0.015). There was a strong trend towards a higher hemicraniectomy requirement in medically vs. endovascularly treated patients (20% versus 6%, p=0.06) despite similar in-hospital mortality (20% versus 26.7 %, p=0.75).
Conclusions:
Despite a low probability of achieving functional independence, IAT in LVOS patients with ASPECTS 5-7 appears to result in smaller final infarct volumes leading to a reduction in the need for hemicraniectomy and decreasing the degree of overall disability. Therefore, it may be a reasonable option for patients and families who favor a shift from severe to moderate disability. Prospective studies utilizing shift in outcome measures are warranted to confirm these results.
Collapse
Affiliation(s)
| | | | - C H Sun
- Emory Univ/ Grady Memorial Hosp, Atlanta, GA
| | - Kumiko Owada
- Neurology, Emory Univ/ Grady Memorial Hosp, Atlanta, GA
| | | | | | | | | | | | | |
Collapse
|
24
|
Lin S, Li X, Sun C, Feng S, Peng Z, Huang S, Li Z. CT findings of intrarenal yolk sac tumor with tumor thrombus extending into the inferior vena cava: a case report. Korean J Radiol 2014; 15:641-5. [PMID: 25246826 PMCID: PMC4170166 DOI: 10.3348/kjr.2014.15.5.641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Accepted: 04/30/2014] [Indexed: 11/18/2022] Open
Abstract
Yolk sac tumor (YST) is a rare germ cell neoplasm of childhood that usually arises from the testis or ovary. The rare cases of YST in various extragonadal locations have been reported, but the primary intrarenal YST is even more uncommon. Here, we report a case of a primary intrarenal YST with tumor thrombus of the inferior vena cava and left renal vein in a 2-year-old boy, with an emphasis on the CT features. To our knowledge, this is the first reported case of an intrarenal YST with intravascular involvement.
Collapse
Affiliation(s)
- ShaoChun Lin
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - XueHua Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - CanHui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - ShiTing Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - ZhenPeng Peng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - SiYun Huang
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| | - ZiPing Li
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China
| |
Collapse
|
25
|
Luo Y, Cui MY, Liao B, Pui MH, Dong Z, Li XH, Sun CH, Peng ZP, Li ZP, Feng ST. Diagnostic and post-treatment CT appearance of biopsy proven mixed Cryptococcus and Candida cholangitis. J Xray Sci Technol 2014; 22:727-733. [PMID: 25408389 DOI: 10.3233/xst-140457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cryptococcus neoformans and Candida are common opportunistic pathogens of human. There is very limited literature on Cryptococcus neoformans cholangitis or Candida cholangitis in immunocompetent patient while mixed Cryptococcus neoformans and Candida cholangitis has not been reported in the literature ever before. We hereby report the imaging findings of a case of mixed Cryptococcus neoformans and Candida cholangitis in an immunocompetent boy. The CT features included nodules in the cystic duct and common bile duct, dilatation of the intra- and extrahepatic bile ducts with mural thickening, irregular hypodense mass-like lesion extending along the bile ducts from the liver hilum to the periphery which was confirmed by the presence of enlarged and confluent lymph nodes. CT characteristics can contribute to timely diagnosis and treatment of this disease.
Collapse
Affiliation(s)
- Yanji Luo
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Min-Yi Cui
- Department of Radiology, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Zhongshan, Guangdong, China
| | - Bing Liao
- Department of Pathology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Margaret H Pui
- Department of Diagnostic Imaging, Sault Area Hospital, Sault Ste Marie, ON, Canada
| | - Zhi Dong
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Xue-Hua Li
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Zhen-Peng Peng
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Zi-Ping Li
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China
| |
Collapse
|
26
|
Zhang HJ, Sun CH, Kuang HY, Jiang XY, Liu HL, Hua WF, Liu ZJ, Zhou H, Sui H, Qi R. 12S-hydroxyeicosatetraenoic acid levels link to coronary artery disease in Type 2 diabetic patients. J Endocrinol Invest 2013; 36:385-9. [PMID: 23095287 DOI: 10.3275/8654] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND 12(S)-Hydroxyeicosatetraenoic acid (12(S)-HETE) is a metabolite of arachidonic acid. 12(S)-HETE is involved in the pathogenesis of atherosclerosis and diabetes. However, the correlation between 12(S)-HETE and coronary artery disease (CAD) in the diabetic patient is unclear. AIMS The study investigated the relationship between 12(S)-HETE and CAD in Type 2 diabetes (T2D). METHODS Plasma 12(S)- HETE levels were detected by enzyme-linked immunosorbent assay in 103 healthy controls (control), 109 diabetic patients without CAD (diabetic), and 152 diabetic patients with CAD (diabetic-CAD). RESULTS 12(S)-HETE levels were higher in both diabetic and diabetic-CAD groups compared to control and in the diabetic-CAD group compared to the diabetic group. In the multiple linear stepwise regression analysis, 12(S)-HETE levels correlated independently with CAD, systolic blood pressure, and glycated hemoglobin. CONCLUSIONS These results indicate that 12(S)-HETE levels are increased in diabetic patients with CAD, suggesting a role for atherosclerosis in T2D.
Collapse
Affiliation(s)
- H J Zhang
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Feng RN, Niu YC, Sun XW, Li Q, Zhao C, Wang C, Guo FC, Sun CH, Li Y. Histidine supplementation improves insulin resistance through suppressed inflammation in obese women with the metabolic syndrome: a randomised controlled trial. Diabetologia 2013; 56:985-94. [PMID: 23361591 DOI: 10.1007/s00125-013-2839-7] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 01/07/2013] [Indexed: 12/22/2022]
Abstract
AIMS/HYPOTHESIS Increased inflammation and oxidative stress are associated with insulin resistance (IR) and metabolic disorders. Serum histidine levels are lower and are negatively associated with inflammation and oxidative stress in obese women. The objective of this study was to evaluate the efficacy of histidine supplementation on IR, inflammation, oxidative stress and metabolic disorders in obese women with the metabolic syndrome (MetS). METHODS A total of 100 obese women aged 33-51 years with BMI ≥ 28 kg/m² and diagnosed with MetS were included following a health examination in the community hospital in this randomised, double-blinded, placebo-controlled trial. Participants were allocated to interventions by an investigator using sequentially numbered sealed envelopes and received 4 g/day histidine (n = 50) or identical placebo (n = 50) for 12 weeks. Participants then attended the same clinic every 2 weeks for scheduled interviews and to count tablets returned. Serum histidine, HOMA-IR, BMI, waist circumference, fat mass, serum NEFA, and variables connected to inflammation and oxidative stress were measured at baseline and 12 weeks. Participants, examining physicians and investigators assessing the outcomes were blinded to group assignment. In addition, the inflammatory mechanisms of histidine were also explored in adipocytes. RESULTS At 12 weeks, a total of 92 participants completed this trail. Compared with the placebo group (n = 47), histidine supplementation significantly decreased HOMA-IR (-1.09 [95% CI -1.49, -0.68]), BMI (-0.86 kg/m² [95% CI -1.55, -0.17]), waist circumference (-2.86 cm [95% CI -3.86, -1.86]), fat mass (-2.71 kg [95% CI -3.69, -1.73]), serum NEFA (-173.26 μmol/l [95% CI -208.57, -137.94]), serum inflammatory cytokines (TNF-α, -3.96 pg/ml [95% CI -5.29, -2.62]; IL-6, -2.15 pg/ml [95% CI -2.52, -1.78]), oxidative stress (superoxide dismutase, 17.84 U/ml [95% CI 15.03, 20.65]; glutathione peroxidase, 13.71 nmol/ml [95% CI 9.65, 17.78]) and increased serum histidine and adiponectin by 18.23 μmol/l [95% CI 11.74, 24.71] and 2.02 ng/ml [95% CI 0.60, 3.44] in histidine supplementation group (n = 45), respectively. There were significant correlations between changes in serum histidine and changes of IR and its risk factors. No side effects were observed during the intervention. In vitro study indicated that histidine suppresses IL6 and TNF mRNA expression and nuclear factor kappa-B (NF-κB) protein production in palmitic acid-induced adipocytes in a dose-dependent manner, and these changes were diminished by an inhibitor of NF-κB. CONCLUSIONS/INTERPRETATION Histidine supplementation could improve IR, reduce BMI, fat mass and NEFA and suppress inflammation and oxidative stress in obese women with MetS; histidine could improve IR through suppressed pro-inflammatory cytokine expression, possibly by the NF-κB pathway, in adipocytes.
Collapse
Affiliation(s)
- R N Feng
- Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang, People's Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Sun CH, Li X, Chan T, Peng Z, Dong Z, Luo Y, Li ZP, Feng ST. Multidetector computed tomography (MDCT) manifestations of the normal duodenal papilla. Eur J Radiol 2013; 82:918-22. [PMID: 23394761 DOI: 10.1016/j.ejrad.2013.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 12/09/2012] [Accepted: 01/02/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVE This study aimed to investigate Multidetector Computed Tomography (MDCT) manifestations of the normal duodenal papilla, thereby improving the knowledge on the CT manifestations of the normal anatomy of the duodenal papilla. METHODS A retrospective study was conducted by reviewing the CT results of 70 normal duodenal papilla cases examined by 64-MDCT. The analysis particularly focused on the position, size, morphology, and enhancement pattern of the duodenal papilla, as well as the ampulla of Vater. RESULTS In axial images, the average base diameter of the duodenal papilla was (7.3 ± 1.4)mm, whereas the average height was (6.5 ± 1.8)mm. Majority of the duodenal papilla (52.9%, 37/70) showed a round shape. In most cases (97.1%, 68/70), the duodenal papilla were located at the middle and lower third of the descending duodenum. In 84.3% of the cases (59/70), the arterial phase enhanced CT scan images were optimal for the visualization of the papilla. The "target sign" could be clearly identified from arterial phase images in 71.4% (50/70) of the cases. In 72.9% (51/70) of the cases, the ampulla of Vater had a common channel (Y type). CONCLUSION 64-MDCT can clearly visualize the normal anatomy of the duodenal papilla and surrounding structures, thereby providing valuable information for the diagnosis and treatment of diseases in this region.
Collapse
Affiliation(s)
- Can-Hui Sun
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Sun CH, Feng ST, Xiao P, Peng ZP, Pui MH, Li XH, Li ZP, Meng QF. Quantitative assessment of perirectal tumor infiltration with dynamic contrast-enhanced multi-detector row CT in rectal cancer. Eur J Radiol 2011; 80:279-83. [DOI: 10.1016/j.ejrad.2010.06.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 06/26/2010] [Accepted: 06/30/2010] [Indexed: 11/16/2022]
|
30
|
Feng ST, Li H, Sun CH, Qiu PX, Zhang ZW, Shuai XT, Li ZP, Meng QF. [Pilot study on MRI of human colon adenocarcinoma cells labeled with superparamagnetic iron oxide in vitro]. Zhonghua Wei Chang Wai Ke Za Zhi 2011; 14:27-30. [PMID: 21271375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To study the feasibility of MRI of human colon adenocarcinoma cell line (Lovo) labeled with superparamagnetic iron oxide(SPIO) nanoparticles in vitro. METHODS Lovo cells (5 × 10(5) and 1 × 10(6)) were cultured in medium containing different SPIO nanoparticles (50 microl and 500 microl). Transmission electron microscopy was used to observe cellular ultrastructure and to determine the uptake and distribution of particles in Lovo cells at 1-, 3-, 6-hours. MRI of Lovo cells was performed with T1WI, T2WI sequences. Unlabeled cells were used as controls. RESULTS Uptake of SPIO nanoparticles occurred within 6 hours. On T1 weighted imaging, there was no significant difference in signal intensity between the experimental groups and the control group. On T2 weighted imaging, there was no significant difference in signal intensity between the experimental groups and the control group after culture of 1 h. Signal intensity began to decrease in 1 × 10(6) Lovo cells labeled with 500 microl SPIO nanoparticle after 3 hours culture. Signal intensity decreased in all the experimental groups after 6 hours culture. CONCLUSION Human colon adenocarcinoma cell line (Lovo) can be labeled with SPIO nanoparticles, and the labeled cells can be imaged with MRI equipment.
Collapse
Affiliation(s)
- Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Feng ST, Chan T, Ching ASC, Sun CH, Guo HY, Fan M, Meng QF, Li ZP. CT and MR imaging characteristics of infantile hepatic hemangioendothelioma. Eur J Radiol 2010; 76:e24-9. [PMID: 20576387 DOI: 10.1016/j.ejrad.2010.05.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Revised: 05/18/2010] [Accepted: 05/21/2010] [Indexed: 01/06/2023]
Abstract
AIM This study aims to analyze computed tomography (CT) and magnetic resonance (MR) imaging features of infantile hepatic hemangioendotheliomas before and after treatment. MATERIALS AND METHODS CT and MR examinations of seven infants with biopsy proven hepatic hemangioendotheliomas were retrospectively analyzed. The distribution, number, size, imaging appearance, enhancement pattern and post-treatment changes of the tumors were evaluated. RESULTS A total of 153 hepatic hemangioendotheliomas were detected on CT (111) and MR (42) imaging. In six infants, 109/111 (98.2%) tumors were hypodense and 2/111 (1.8%) lesions contained calcification on unenhanced CT. On MR imaging, all 42 lesions in one infant were heterogeneously T1-hypointense and T2-hyperintense compared to the normal liver parenchyma. Contrast-enhanced CT and MRI showed peripheral rim (51.6%), uniform (48.4%), fibrillary (33.3%), and nodular (28.8%) contrast enhancement in the hepatic arterial phase. Homogeneous (100%), rim (98.2%) and mixed enhancement patterns were noted in tumors <1.0cm, >2.0cm and 1.0-2.0cm in diameter respectively in the hepatic arterial phase. In three patients who underwent steroid therapy, follow-up CT examination demonstrated tumor size reduction and increased intra-tumoral calcification in two patients. CONCLUSION Infantile hepatic hemangioendotheliomas show some typical imaging features and size-dependent pattern of contrast enhancement on CT and MR imaging, which allow accurate imaging diagnosis and post-treatment evaluation.
Collapse
Affiliation(s)
- Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen Univeristy, 58th, The Second Zhongshan Road, Guangzhou, China.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Feng ST, Chan T, Sun CH, Li ZP, Guo HY, Yang GQ, Peng ZP, Meng QF. Multiphasic MDCT in small bowel volvulus. Eur J Radiol 2009; 76:e13-8. [PMID: 19926241 DOI: 10.1016/j.ejrad.2009.10.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 10/15/2009] [Accepted: 10/15/2009] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Evaluate the use of MDCT with 3D CT angiography (CTA) and CT portal venography (CTPV) reconstruction for the diagnosis of small bowel volvulus (SBV). METHODS Multiphasic MDCT findings in nine patients (seven males and two females, age range 2-70) with surgically proven SBV were retrospectively reviewed. Non-contrast and double phase contrast enhanced MDCT including 3D CTA and CTPV reconstruction were performed in all the patients. Two experienced abdominal radiologists evaluated the images and defined the location, direction and degree of SBV. RESULTS On axial MDCT images, all cases show segmental or global dilatation of small intestine. Other findings include circumferential bowel wall thickening in eight cases, halo appearance and hyperemia in seven cases, whirl sign in six cases, beak-like appearance in six cases, closed loops in six cases and ascites in one case. CTA/CTPV showed abnormal courses involving main trunks of superior mesenteric artery (SMA) and superior mesenteric vein (SMV) in seven cases, with or without distortion of their tributaries. Normal course of SMA but abnormal course of SMV was seen in the other two cases. Of all the nine cases, whirl sign was seen in six cases and barber's pole sign in five cases. Dilated SMV was observed in eight cases and abrupt termination of SMA was found in one case. Compared with surgical findings, the location, direction and degree of SBV were correctly estimated in all cases based on CTA/CTPV. CONCLUSION Multiphasic MDCT with CTA/CTPV reconstruction can play an important role in the diagnosis of SBV. The location, direction and degree of SBV can all be defined preoperatively using this method.
Collapse
Affiliation(s)
- Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital, Sun Yat-Sen University, 58th The Second Zhongshan Road, Guangzhou, China.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Du AJ, Sun CH, Zhu ZH, Lu GQ, Rudolph V, Smith SC. The effect of Fe doping on adsorption of CO2/N2 within carbon nanotubes: a density functional theory study with dispersion corrections. Nanotechnology 2009; 20:375701. [PMID: 19706942 DOI: 10.1088/0957-4484/20/37/375701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An ab initio density functional theory (DFT) study with correction for dispersive interactions was performed to study the adsorption of N(2) and CO(2) inside an (8, 8) single-walled carbon nanotube. We find that the approach of combining DFT and van der Waals correction is very effective for describing the long-range interaction between N(2)/CO(2) and the carbon nanotube (CNT). Surprisingly, exohedral doping of an Fe atom onto the CNT surface will only affect the adsorption energy of the quadrupolar CO(2) molecule inside the CNT (20-30%), and not that of molecular N(2). Our results suggest the feasibility of enhancement of CO(2)/N(2) separation in CNT-based membranes by using exohedral doping of metal atoms.
Collapse
Affiliation(s)
- A J Du
- Centre for Computational Molecular Science, The University of Queensland, Australian Institute for Bioengineering and Nanotechnology Building 75, QLD 4072, Brisbane, Australia.
| | | | | | | | | | | |
Collapse
|
34
|
Du AJ, Smith SC, Yao XD, Sun CH, Li L, Lu GQ. First principle study of hydrogenation of MgB2: an important step toward reversible hydrogen storage in the coupled LiBH4/MgH2 system. J Nanosci Nanotechnol 2009; 9:4388-4391. [PMID: 19916462 DOI: 10.1166/jnn.2009.m65] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Recent experiments [F. E. Pinkerton, M. S. Meyer, G. P. Meisner, M. P. Balogh, and J. J. Vajo, J. Phys. Chem. C 111, 12881 (2007) and J. J. Vajo and G. L. Olson, Scripta Mater. 56, 829 (2007)] demonstrated that the recycling of hydrogen in the coupled LiBH4/MgH2 system is fully reversible. The rehydrogenation of MgB2 is an important step toward the reversibility. By using ab initio density functional theory calculations, we found that the activation barrier for the dissociation of H2 are 0.49 and 0.58 eV for the B and Mg-terminated MgB2(0001) surface, respectively. This implies that the dissociation kinetics of H2 on a MgB2(0001) surface should be greatly improved compared to that in pure Mg materials. Additionally, the diffusion of dissociated H atom on the Mg-terminated MgB2(0001) surface is almost barrier-less. Our results shed light on the experimentally-observed reversibility and improved kinetics for the coupled LiBH4/MgH2 system.
Collapse
Affiliation(s)
- A J Du
- Centre for Computational Molecular Science, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072, Australia
| | | | | | | | | | | |
Collapse
|
35
|
Feng ST, Sun CH, Li ZP, Mak HKF, Peng ZP, Guo HY, Meng QF. Evaluation of angiogenesis in colorectal carcinoma with multidetector-row CT multislice perfusion imaging. Eur J Radiol 2009; 75:191-6. [PMID: 19481397 DOI: 10.1016/j.ejrad.2009.04.058] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2008] [Accepted: 04/23/2009] [Indexed: 11/26/2022]
Abstract
To evaluate the correlation between 64 multidetector-row CT (64MDCT) perfusion imaging in colorectal carcinoma and microvessel density (MVD) and vascular endothelial growth factor (VEGF), 64MDCT perfusion imaging was performed in 33 patients with pathologically verified colorectal carcinoma. These images were analyzed with perfusion functional software, and time-density curves (TDC) were created for the region of interest (ROI) encompassing the tumor, the target artery and vein. The individual perfusion maps generated indicated blood flow (BF), blood volume (BV), mean transit time (MTT), and permeability-surface area product (PS). MVD and VEGF were evaluated by immunohistochemical staining with anti-CD34 and anti-VEGF, respectively. Correlations between MVD or VEGF with CT perfusion parameters and clinicopathological factors (Dukes' stages, invasion depth, and lymph node and liver metastasis) were also investigated. MVD in the colorectal carcinoma was 22.61+/-9.01 per x200 field. The scores obtained for VEGF expression were 4.15+/-1.09. VEGF staining was positive in 25 of 29 tumors (86.2%). There was no significant correlation between the presence of MVD, VEGF expression and clinicopathological factors (P>0.05). There was also no correlation between MVD, VEGF expression, and any dynamic CT parameters (P>0.05). The BV and MTT were significantly higher in tumors demonstrating serous coat invasion than in those without it (t=-2.63, -2.24, P=0.0137, 0.0331, respectively). BV was also significantly correlated with tumor size (r=0.41, P=0.02). Neither BF nor PS was correlated with clinicopathological factors. In conclusion, 64MDCT perfusion imaging, MVD, and VEGF may reflect angiogenic activity, but no significant correlation among these factors.
Collapse
Affiliation(s)
- Shi-Ting Feng
- Department of Radiology, The First Affiliated Hospital of SunYat-sen University, Guangzhou 510080, China.
| | | | | | | | | | | | | |
Collapse
|
36
|
Abstract
AIM: To investigate the value of spiral CT pneumocolon in preoperative colorectal carcinoma.
METHODS: Spiral CT pneumocolon was performed prior to surgery in 64 patients with colorectal carcinoma. Spiral CT images were compared to specimens from the resected tumor.
RESULTS: Spiral CT depicted the tumor in all patients. Comparison of spiral CT and histologic results showed that the sensitivity and specificity were 95.2%, 40.9% in detection of local invasion, and 75.0%, 90.9% in detection of lymph node metastasis. Compared to the Dukes classification, the disease was correctly staged as A in 6 of 18 patients, as B in 18 of 23, as C in 10 of 15, and as D in 7 of 8. Overall, spiral CT correctly staged 64.1% of patients.
CONCLUSION: Spiral CT pneumocolon may be useful in the preoperative assessment of patients with colorectal carcinoma as a means for assisting surgical planning.
Collapse
Affiliation(s)
- Can-Hui Sun
- Department of Radiology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China
| | | | | | | | | |
Collapse
|
37
|
Abstract
How short can single-walled carbon nanotubes (SWNTs) be? How stable are such supershort SWNTs (ss-SWNTs)? This work is the first to address these questions. On the basis of binding energy (E(B)), standard heats of formation , and strain energy (E(S)), we found that SWNTs with only one benzene ring in the axial direction, which we refer to as supershort SWNTs (ss-SWNTs), can be thermodynamically stable. On the basis of the data of E(B), , and E(S), the relative stabilities of ss-SWNTs, fullerenes, polycyclic aromatic hydrocarbons, and butadiyne are discussed. This study has laid a theoretical foundation for the possible synthesis of ss-SWNTs.
Collapse
Affiliation(s)
- C H Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
| | | | | | | |
Collapse
|
38
|
Abstract
AIM: To investigate the correlation between microvessel density and spiral CT perfusion imaging in colorectal carcinoma.
METHODS: Thirty-seven patients, with histologically proven colorectal carcinoma, underwent water enema spiral CT scan. The largest axial surface of the primary tumor was searched on unenhanced spiral CT images. At this level, the enhanced dynamic scan series was acquired. Time-density curves (TDC) were created from the region of interest drawn over the tumor, target artery by Toshiba Xpress/SX spiral CT with perfusion functional software. Then the perfusion was calculated. Microvessel density (MVD) was evaluated using immunohistochemical staining of surgical specimens with anti-CD34, and then MVD was correlated with perfusion.
RESULTS: MVD of colorectal carcinomas was 33.11-173.44, mean 87.28, and perfusion was 15.60-64.80 mL/min/ 100 g, mean 39.74 mL/min/100 g. MVD and perfusion were not associated with invasive depth, metastasis and disease stage, and they all decreased with increasing Dukes’ stage, but no significant correlation was found between them (r = 0.18, P = 0.29).
CONCLUSION: There is no significant correlation between MVD and perfusion. Neovascularizaton and perfusion are highly presented in early colorectal carcinoma. CT perfusion imaging may be more suited for assessing tumorigenesis in colorectal carcinoma than histological MVD technique.
Collapse
Affiliation(s)
- Zi-Ping Li
- Department of Radiology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, Guangdong Province, China.
| | | | | | | | | | | | | |
Collapse
|
39
|
Madsen SJ, Sun CH, Tromberg BJ, Hirschberg H. Development of a novel indwelling balloon applicator for optimizing light delivery in photodynamic therapy. Lasers Surg Med 2002; 29:406-12. [PMID: 11891728 DOI: 10.1002/lsm.10005] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVE A human glioma spheroid model is used to investigate the efficacy of different light delivery schemes in 5-aminolevulinic acid (ALA)--mediated photodynamic therapy (PDT). The results provide the rationale for the development of an indwelling balloon applicator for optimizing light delivery. STUDY DESIGN/MATERIALS AND METHODS Human glioma spheroids were incubated in ALA (100 or 1000 microg /ml-1) for 4 hours and subjected to various light irradiation schemes. In one set of experiments, spheroid survival was monitored as a function of light fluence rate (5-200 mW cm-2). In all cases, spheroids were exposed to fluences of either 25 or 50 J cm-2. In a second study, the effects of repeated weekly PDT treatments, using sub-threshold fluences, were investigated. One group of spheroids was subjected to three treatments using fluences of 12, 12, and 25 J cm-2. Results were compared to spheroids receiving single treatments of either 12 or 25 J cm-2. A fluence rate of 25 mW cm-2 was used for all three groups of spheroids. In all cases, the effect of a given irradiation scheme was evaluated by monitoring spheroid growth. RESULTS Low fluence rates produce greater cell kill than high fluence rates. The minimum effective fluence rate in human glioma spheroids is approximately 10 mW cm-2. Repeated weekly PDT treatments with sub-threshold fluences result in significant cell kill. In spheroids surviving the PDT treatments, growth is suppressed for the duration of the treatment period. CONCLUSION The results of the in vitro studies support the development of an indwelling balloon applicator for the delivery of light doses in long term multi-fractionated PDT regimens.
Collapse
Affiliation(s)
- S J Madsen
- Department of Health Physics, University of Nevada, Las Vegas, Nevada 89154, USA.
| | | | | | | |
Collapse
|
40
|
Sun CH, Liu L, Yin Q. [Bioequivalence of bambuteral and its metabolites terbutaline after oral bambuteral tablet in healthy volunteers by HPLC/MS]. Yao Xue Xue Bao 2001; 36:368-72. [PMID: 12584861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To study bioequivalence of bambuteral and its metablites terbutaline in 20 healthy male volunteers. METHODS A single oral dose of domestic or imported bambuteral tablet was given according to a randomized 2-way cross-over design. The plasma bambuteral and terbutaline concentrations were determined by HPLC/MS. RESULTS The pharmacokinetic parameters of domestic and imported bambuteral: AUC0-t were (52 +/- 21) microgram.h.L-1 and (51 +/- 20) microgram.h.L-1, Tmax were (2.9 +/- 0.9) h and (2.6 +/- 0.7) h, Cmax were (6.0 +/- 2.6) microgram.L-1 and (6.2 +/- 2.9) microgram.L-1, T1/2Ke were (11.2 +/- 2.3) h and (11.2 +/- 1.9) h, respectively; terbutaline: AUC0-t were (191 +/- 30) microgram.h.L-1 and (197 +/- 37) microgram.h.L-1; Tmax were (4.2 +/- 1.0) h and (4.2 +/- 1.0) h; Cmax were (10 +/- 5) microgram.L-1 and (10 +/- 4) microgram.L-1; T1/2Ke were (20 +/- 3) h and (21 +/- 4) h, respectively. The bioavaiability of the domestics was 102% +/- 8% (bambuteral) and 100% +/- 12% (terbutaline). CONCLUSION The results demonstrate that the two forms of bambuteral and terbutaline were bioequivalent by analysis of variance, two-one sided test and 90% confidential limit.
Collapse
Affiliation(s)
- C H Sun
- Clinical Pharmacology Base, Beijing Hospital, Beijing 100730, China.
| | | | | |
Collapse
|
41
|
Agarwal A, Coleno ML, Wallace VP, Wu WY, Sun CH, Tromberg BJ, George SC. Two-photon laser scanning microscopy of epithelial cell-modulated collagen density in engineered human lung tissue. Tissue Eng 2001; 7:191-202. [PMID: 11304454 DOI: 10.1089/107632701300062813] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Tissue remodeling is a complex process that can occur in response to a wound or injury. In lung tissue, abnormal remodeling can lead to permanent structural changes that are characteristic of important lung diseases such as interstitial pulmonary fibrosis and bronchial asthma. Fibroblast-mediated contraction of three-dimensional collagen gels is considered an in vitro model of tissue contraction and remodeling, and the epithelium is one factor thought to modulate this process. We studied the effects of epithelium on collagen density and contraction using two-photon laser scanning microscopy (TPLSM). TPLSM was used to image autofluorescence of collagen fibers in an engineered tissue model of the human respiratory mucosa -- a three-dimensional co-culture of human lung fibroblasts (CCD-18 lu), denatured type I collagen, and a monolayer of human alveolar epithelial cell line (A549) or human bronchial epithelial cell line (16HBE14o(-)). Tissues were imaged at days 1, 8, and 15 at 10 depths within the tissue. Gel contraction was measured concurrently with TPLSM imaging. Image analysis shows that gels without an epithelium had the fastest rate of decay of fluorescent signal, corresponding to highest collagen density. Results of the gel contraction assay show that gels without an epithelium also had the highest degree of contraction (19.8% +/- 4.0%). We conclude that epithelial cells modulate collagen density and contraction of engineered human lung tissue, and TPLSM is an effective tool to investigate this phenomenon.
Collapse
Affiliation(s)
- A Agarwal
- Department of Chemical and Biochemical Engineering & Materials Science, University of California, Irvine, California 92697-2575, USA
| | | | | | | | | | | | | |
Collapse
|
42
|
Wong BJ, Chao KK, Kim HK, Chu EA, Dao X, Gaon M, Sun CH, Nelson JS. The porcine and lagomorph septal cartilages: models for tissue engineering and morphologic cartilage research. Am J Rhinol 2001; 15:109-16. [PMID: 11345149 DOI: 10.2500/105065801781543790] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Interest in reconstruction and modification of the facial cartilaginous frameworks using advanced technology and instrumentation is growing rapidly. Despite this maturing interest, no animal model has been established to provide morphologic cartilage tissue with similar characteristics to human septum in suitable quantities. The objective of this study was to characterize porcine and lagomorph (rabbit) nasal septal cartilage tissue. Both models share great similarity with their human counterpart and provide a low-cost, high-volume, and easily obtained source of bulk cartilage tissue. We present a technique for harvesting intact septal cartilages from these species, and characterize select cellular, metabolic, and physical properties using pulse-chase radiolabeling, flow cytometry, and mechanical analysis. Our selective evaluation of key tissue properties establishes these species as appropriate animal models for nasal septal cartilaginous surgery.
Collapse
Affiliation(s)
- B J Wong
- Beckman Laser Institute and Medical Clinic, University of California-Irvine 92612, USA
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Abstract
The response of human glioma spheroids to 5-aminolevulinic acid (ALA)-mediated photodynamic therapy (PDT) is investigated. A two-photon fluorescence microscopy technique is used to show that human glioma cells readily convert ALA to protoporphyrin IX throughout the entire spheroid volume. The central finding of this study is that the response of human glioma spheroids to ALA-mediated PDT depends not only on the total fluence, but also on the rate at which the fluence is delivered. At low fluences (< or = 50 J cm-2), lower fluence rates are more effective. At a fluence of 50 J cm-2, near-total spheroid kill is observed at fluence rates of as low as 10 mW cm-2. The fluence rate effect is not as pronounced at higher fluences (> 50 J cm-2), where a favorable response is observed throughout the range of fluence rates investigated. The clinical implications of these findings are discussed.
Collapse
Affiliation(s)
- S J Madsen
- Department of Health Physics, University of Nevada, Las Vegas 89154-3037, USA.
| | | | | | | | | |
Collapse
|
44
|
Abstract
The response of human glioma spheroids to 5-aminolevulinic acid (ALA)-mediated photodynamic therapy (PDT) is investigated. A two-photon fluorescence microscopy technique is used to show that human glioma cells readily convert ALA to protoporphyrin IX throughout the entire spheroid volume. The central finding of this study is that the response of human glioma spheroids to ALA-mediated PDT depends not only on the total fluence, but also on the rate at which the fluence is delivered. At low fluences (< or = 50 J cm-2), lower fluence rates are more effective. At a fluence of 50 J cm-2, near-total spheroid kill is observed at fluence rates of as low as 10 mW cm-2. The fluence rate effect is not as pronounced at higher fluences (> 50 J cm-2), where a favorable response is observed throughout the range of fluence rates investigated. The clinical implications of these findings are discussed.
Collapse
Affiliation(s)
- S J Madsen
- Department of Health Physics, University of Nevada, Las Vegas 89154-3037, USA.
| | | | | | | | | |
Collapse
|
45
|
Hammer-Wilson MJ, Sun CH, Ghahramanlou M, Berns MW. In vitro and in vivo comparison of argon-pumped and diode lasers for photodynamic therapy using second-generation photosensitizers. Lasers Surg Med 2000; 23:274-80. [PMID: 9888323 DOI: 10.1002/(sici)1096-9101(1998)23:5<274::aid-lsm7>3.0.co;2-o] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVE Three prototype microchannel-cooled stacked diode array lasers were compared with the currently used conventional argon ion laser-pumped tunable dye lasers for suitability as light sources in photodynamic therapy (PDT) treatment. STUDY DESIGN/MATERIALS AND METHODS The PDT response of Chinese hamster ovary (CHO-K1) cells in culture and SMT-F tumor bearing mice treated with chloro-aluminum sulfonated phthalocyanin (CASPc), benzoporphyrin derivative mono-acid (BPD-MA), and lutetium texaphyrin (Lutex) was determined using each laser light source. Survival of the CHO cells was measured using a cloning assay. Tumor regression/eradication was used to assess response in the mice. RESULTS Both sources of laser light produced comparable PDT responses in the two systems tested. CONCLUSION It would be possible to replace the currently used argon ion laser-pumped dye laser systems with the diode lasers tested.
Collapse
Affiliation(s)
- M J Hammer-Wilson
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92697-1475, USA
| | | | | | | |
Collapse
|
46
|
Abstract
BACKGROUND AND OBJECTIVE The objective of the present study was to evaluate the feasibility of photodynamic therapy (PDT) for complicated hemangiomas. The photosensitizing activities of 5-aminolevulinic acid (5-ALA) and Photofrin were evaluated in vitro with human dermal microvascular endothelial cells (MEC) and in vivo with the chicken cox comb. STUDY DESIGN/MATERIALS AND METHODS The in vitro absorption and photosensitizing activities of 5-ALA and Photofrin were examined in a MEC culture system. The percentages of MEC killed by different drug concentrations at a wavelength of 630 nm were measured by either live/dead or lactate dehydrogenase-released assays. Similarly, the in vivo biological activities of 5-ALA and Photofrin exposed to different total light dosages at 630 nm were studied by determining the amount of necrosis produced in chicken combs. RESULTS MEC incubated with 5-ALA at a concentration of 35 microg/ml and exposed to laser light at 630 nm at a power density of 100 mW/cm2 showed a 50% cell kill. MEC incubated with Photofrin at a concentration of 3.5 microg/ml and exposed to laser light at 630 nm at a power density of 100 mW/cm2 showed a 50% cell kill. Chicken combs that received 200 mg/kg of 5-ALA exposed to laser light at 630 nm at a power density of 100 mW/cm2 had an injury depth of 362.5+/-27.6 microm at histologic examination. Combs exposed to a power density of 100 or 120 mW/cm2 showed injury depths of 732.5+/-29.1 and 792.5+/-36.0 microm, respectively. Chicken combs that received 2.5 mg/kg of Photofrin exposed to laser light at 630 nm at a power density of 80 mW/cm2 had an injury depth of 535.6+/-22.3 microm at histologic examination. Combs exposed to a power density of 100 or 120 mW/cm2 showed injury depths of 795.8+/-32.5 and 805.2+/-49.1 microm, respectively. CONCLUSION Both 5-ALA and Photofrin have the capability to destroy MEC in vitro and vasculature in vivo. However, Photofrin achieved a higher degree of cell kill and tissue destruction at lower drug concentrations and at lower power densities.
Collapse
Affiliation(s)
- C J Chang
- Chang Gung Memorial Hospital, Chang Gung Medical College, Taipei, Taiwan
| | | | | | | | | |
Collapse
|
47
|
Abstract
The Eph family of tyrosine kinase receptors and ligands play key roles in cell segregation and axon targeting in the developing nervous system. Interactions between the ligands and receptors cause repulsion or degeneration of receptor-positive axons from several brain regions including the retina, hippocampus, thalamus, and midbrain dopaminergic system. We extend these previous observations by showing that three A-ephrins also negatively regulate the growth of neurites from striatal and olfactory neurons. In addition to negative effects, however, we also report a trophic activity of the A-ephrins: Ephrin-A2 and A5 promote survival and neurite outgrowth of sympathetic neurons. These observations provide support to the notion that ephrins may function as either negative or positive signals in the developing nervous system.
Collapse
Affiliation(s)
- P P Gao
- Department of Chemical Biology, Laboratory for Cancer Research, College of Pharmacy, Rutgers University, NJ, USA
| | | | | | | | | |
Collapse
|
48
|
Wong BJ, Milner TE, Kim HK, Chao K, Sun CH, Sobol EN, Nelson JS. Proteoglycan synthesis in porcine nasal cartilage grafts following Nd:YAG (lambda = 1.32 microns) laser-mediated reshaping. Photochem Photobiol 2000; 71:218-24. [PMID: 10687397 DOI: 10.1562/0031-8655(2000)071<0218:psipnc>2.0.co;2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mechanically deformed morphologic cartilage grafts undergo temperature-dependent stress relaxation during sustained laser irradiation resulting in stable shape changes. In this study, porcine nasal septal cartilage specimens were evaluated for viability by measuring the incorporation of Na2(35)SO4 into proteoglycan (PTG) macromolecules in whole tissue culture following laser-mediated reshaping. Synthesis rates of PTG were determined by scintillation counting lyophilized specimens and normalizing these values by total protein content. Positive controls were established by inducing chondrocyte apoptosis using prolonged exposure to nitric oxide (NO). In chondrocytes, apoptosis induced using NO resulted in significantly lower PTG synthesis rates compared to untreated native specimens. Cartilage specimens were irradiated with light emitted from a Nd:YAG laser (25 W/cm2, lambda = 1.32 microns) while recording simultaneously radiometric surface temperature, internal stress and back-scattered light intensity from a probe laser. Each specimen received one, two or three sequential laser exposures. The duration of each exposure was determined from real-time measurements of characteristic changes in back-scattered light intensity that correlate with accelerated stress relaxation. A 5 min time interval between each laser exposures allowed the cartilage specimen to return to thermal equilibrium. Average PTG synthesis rates decreased with successive laser exposures, though these were always higher than baseline rates established for NO-treated tissues, suggesting that laser-mediated cartilage reshaping acutely does not eliminate the entire population of viable chondrocytes. The reduction in PTG synthesis is correlated with the time-temperature-dependent heating profile created during laser irradiation, supporting our hypothesis that careful monitoring of laser dosimetry is required to ensure chondrocyte viability.
Collapse
Affiliation(s)
- B J Wong
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612, USA.
| | | | | | | | | | | | | |
Collapse
|
49
|
Abstract
Giardia lamblia is a very common intestinal protozoan pathogen of humans. Recent development of gene transfection systems in G. lamblia has allowed constitutive expression of selected genes in the organism. To extend the uses of DNA transfection in G. lamblia, an inducible gene expression system was developed by integrating the bacterial tet operator-repressor elements into an episomal DNA transfection vector. Tetracycline-responsive promoters with insertions of multiple tet operator sequences in the vicinity of a synthetic ran promoter were tested for their inducibility of a luciferase reporter gene expression. Stable cell lines transfected with individual plasmid constructs were established under drug selection. By assaying luciferase activity in transfected cells in response to tetracycline, an inducible promoter with insertion of two tet operators downstream of the adjacent synthetic ran promoter was found to confer a 10-fold inducibility in gene expression with co-expression of the tet-repressor driven by a gdh promoter. To further improve its inducibility, several other synthetic promoter contexts were also tested to increase expression of the tet-repressor gene. An optimal inducibility of 50-fold was obtained when a synthetic alpha-giardin promoter was used. Fine tuning of luciferase expression was achieved by adjusting the concentration of tetracycline and duration of drug exposure. The inducible gene expression system provides us an easy way to manipulate the level of gene expression in G. lamblia in a controllable manner that could not previously be achieved.
Collapse
Affiliation(s)
- C H Sun
- Division of Infectious Diseases, Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, ROC
| | | |
Collapse
|
50
|
Abstract
The promoter elements that regulate transcription initiation in Giardia lamblia are poorly understood. In this report, the promoter of the Giardia ran gene was studied using a luciferase expression plasmid pRANluc+ to monitor transcription efficiency. An AT-rich sequence spanning -51/-20 relative to the translation start site of the ran gene was identified and was found to be required for efficient luciferase expression by deletion and mutation mapping of pRANluc+. The -51/-20 sequence was also sufficient for promoter activity as revealed from studies on a 32-base pair synthetic promoter derived from this region. Deletion mapping of the synthetic promoter revealed two minimal promoter elements, -51/-42 and -30/-20, sufficient for 6- and 30-fold luciferase expression above background, respectively. The transcription start sites on luc+ messenger RNA were determined by the position of the synthetic promoter in the luciferase expression plasmids as shown by primer extension experiments. Results from electrophoretic mobility shift assays revealed multiple DNA-protein complexes upon binding of nuclear proteins with either DNA strand but not the double-stranded DNA derived from the ran promoter. Our results delineate the first promoter sequence of the Giardia gene (ran), which provides an excellent model for future studies on transcription regulation in this protozoan parasite.
Collapse
Affiliation(s)
- C H Sun
- Division of Infectious Diseases, Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, Republic of China
| | | |
Collapse
|